arch: arm: hotplug: added ASMP hotplug driver

* Adapted suspend/resume to new power_suspend

Thanks a lot
@mrg666
arch: hotplug: autosmp: set cpufreq_up 1574Ghz, cpufreq_down 1190Ghz
arch: hotplug: autosmp: disable by default
arm: autosmp: use percentages for up and down rate limits

Since maximum cpu frequency can be changed, use relative percentage
values for up and down rate limits instead of absolute values. This
will make autosmp more consistent when maximum frequency is changed.
arm: autosmp: switch all pr_info to debug state